Furnace.



R. H. VONDENBOSCH.

PURNAGE.

APPLICATION FILED APR. 22, 1908.

Patented Jan. 11

UNrTED srnrns PATENTOFFICE,

RAYMOND H. VONDENBOSCH, 0F HOLLYWOOD, CALIFORIA, ASSIGNOR OF ONE-HALE"T0 GODFREY FRITZ, 0F LOS ANGELES,`CALIFORNIA.-

FURNACE.

Speciflcation of Letters Patent.

Patented J an. 11, 1910.

To all whom 'it may concern:

Be it known that I, RAYMOND H. VONDEN- Boscn, a citizen of the UnitedStates, residing at Hollywood, in the `county of Los Angeles and Stateof California, have invented new and useful Improvements in Furnaces, ofwhich the following is a specification.

This invention relates to a heating furnace for buildings and consistsin such novel arrangements of the air and flame passage Ways that theheat of the flame is vutilized to its maximum etliciency.

One of the novel features upon which 'the efliciency of this furnacedepends is the repassing of the heated gases of combustion into thebottom of the flue in which the combustion chamber is situatedbeforebeing carried out through the exhaustue to the atmosphere. By thismeans theuncombined air in the heated gases is given an opportunity topass again through the furnace, increasing greatly the efliciency of theflame and of the furnace in general.

Other novel points of construction will appear in the followingdescription.

I accomplish the above vby means of the device described ,herein andillustrated in the accompanying drawings, in which z- Figure 1,-is alongitudinal vertical section of a furnace embodying my invention. Fig.2,-is a horizontal cross-section taken on line 2 2 of Fig. 1.

In the drawings 1 designates an outer cylindrical shell resting upon thefloor and.

provided at itstop with air outlets 2 through which .the heated air isconducted to the rooms of a building in the usual manner.

Near its bottom shell 1 is provided with air inlet openings 3 of anysuit-able size and number. Within the shell, and of such a diameter asto leave an annular air space 4, is an annular chamber 5 whose outerwalls are cylindrical and whose inner wallsare conical in configurationso that the chamber is wide in section at the top and narrow at thebottom. This chamber is provided with a baille plate 6 to partiallyimpede the passage of the heated gases therethroughso as to preventtheir .passing too swiftly from the furnace without giving up a largeproportion of their heat. Chamber 5 is connected by tubes 7 to a iiatdrum 8 situated inside of shell 1 near its top.l This drumis in turnconnected lby a centrally located tube 9 to an inverted cone-shaped flue10 located centrally within the conical opening inside of annularchamber 5. The walls of this conical combustion space are supported onlegs 11 from the bottom of the furnace and base plate 12 thereof isprovided with l air ml'et openlngs 13. Resting upon base plate 12 is acylindrical shield 14 forming a combustion chamber in which burner 15 isplaced. Tubes 16 open from the bottom narrow part of chamber 5 into flue10 directly below the top of shield 14, the shield being slightlycontracted and of such a diameter that an open space is left between itstop and the walls of the flue. An exhaust funnel 17 is connected to thebottom of the flue and leads olf whatever products of combustion passinto the space around shield 14 from tubes 16. A door 18 affords meansfor lighting the ire at burner 15 and for any investigation necessary.

In the operatlon of this furnace thevflame and heated gases ofcombustion pass'upwardly through flue 10 and tube 9 into drum 8. Herethey strike a conical deflector 19 which spreads them radially towardthe outside of the drum where they pass downwardly through tubes 7 intoannular chamber 5. Here they encounter baille plate 6 and then pass tothe bottom of chamberf and through tubes 16 into the space directlysurrounding shield 14. The heavier part of the gases, those parts whichare products of combustion and are dead, pass downwardly as indicated bythe arrows, into the space around shield 14 and out through funnel 17.The lighter parts, the uncombined air', pass upwardly into thecombustion space, and, being warm, materially help in the ventilation ofthe flame and also are given another opportunity to impart their heat tothe air liowing through the adjacent passage ways. The air enters at`the openings 3 and passes up largely between the outer walls of flue 10and the inner walls of chamber 5. Upon reaching 'the top the air the airmay come into contact with as large a heating space as possible aroundthe drum.

-Th'is furnace may be made in any suitable size to supply heat to anynumber of separate rooms, the number of heating ducts and the sizethereof being arranged accordingly.

This furnace is especially designed for gas and can therefore be made oflight sheet material. In actual. practice it heats up quickly with aminimum amount of fuel and maintains its heat with a very small Hameafter having been started.

Having described my invention, what I claim as new and desire -to secureby Letters Patent is 1. A furnace, comprisingan inner Hue, a chamberspaced around said Hue, means establishing communication between saidchamber and the top and bottom of said Hue,

induction means for a Hame at the center of the bottom of said Hue, andexhaust means atl the bottom of said Hue. n

2. A furnace, comprising an inner Hue, a combustion chamber centrallyplaced in the bottom of said Hue, a chamber arranged around said Hue,means establishing communication between said vchamber and the top andbottom of said Hue, and an exhaust Hue connected to the bottom of saidinner Hue below the top of said chamber therein.

3. A furnace, comprising an upright conical Hue, a combustion chambercentrally placed in the bottom of said Hue, a downwardly leading chamberconcentrically arranged around said Hue, the inner wall of said chamberbeing conical, means establishing communication between said chamber andthe top and bottom of said Hue, and an exhaust Hue connected to saidconical Hue at a point below the top of said combustion chamber.

4. A furnace, comprising an upright conical Hue, a combustion chambercentrally placed in the bottom of said Hue, a downwardly leading chamberconcentrically arranged around said Hue, the inner wall of meansestablishing communication between said drum and the tops of saiddownwardly leading chamber and said Hue respectively, and an exhaust Hueconnected to said conical Hue at a point below the top of saidcombustion chamber.

5. A furnace, comprising an outer casing, a centrally disposedcombustion Hue arranged within said casing, a chamber spaced around saidHue, means establishing communication between said chamber and thebottom of said flue, a drum disposed in the upper portion of saidcasing, and means establishing communication between said drum and thetops of said flue and chamber.

6. The combination with a gas furnace having a combustion chamber and acombustion Hue, of a heating drum arranged within said furnace, meansestablishing coxnmunication between the interior of said drum and thetop and bottom of said combustion Hue, and an exhaust Hue connected tosaid combustion Hue below the top of said combustion chamber.

7. A furnace, comprising an outer casing, a centrally disposedcombustion Hue arranged within said casing, a heating drum provided witha plurnlity of vertical Hues opening therethrough, and meansestablishing communication between said drum and the top and bottom ofsaid combustion Hue.

8. A furnace, comprising an outer casing, a centrally disposedcombustion Hue arranged within said casing, a drum, and meansestablishing communication between said drum and the top and bottom ofsaid Hue.

9. A furnace, comprising a casing and a combustion Hue disposed therein,a drum,

and means establishing communication between the top and bottom0 of saidHue and said drum.

In Witness that I claim the foregoing I have hereto subscribed my namethis 13th day of April, 1908.

RAYMOND H. VONDENBOSCH.

Witnesses:

EDMUND A. STRAUSE, OLLIE PALMER.

